<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="user.css">
    <title>修改标题</title>
</head>
<body>
<button id="click">点我返回主页</button>

<div id="teacherCardDiv">
    <table id="teacherCardTable">
        <thead>
            <tr>
                <td></td>
            </tr>
        </thead>
    </table>
</div>

<script src="user.js"></script>
</body>